package com.gdcp.config.security.validate;

import com.gdcp.Exception.ValidateCodeException;
import com.gdcp.config.security.MyAuthenticationFailureHandler;
import com.gdcp.controller.portal.other.ValidateCodeController;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.social.connect.web.HttpSessionSessionStrategy;
import org.springframework.social.connect.web.SessionStrategy;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author 杨华京
 * @version 1.0
 * @description
 * @since 1.8
 */
@Component
public class ValidateCodeFilter extends OncePerRequestFilter {

    @Autowired
    private AuthenticationFailureHandler myAuthenticationFailureHandler;

    private SessionStrategy sessionStrategy=new HttpSessionSessionStrategy();

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        if(StringUtils.equals("/render/user/login",request.getRequestURI()) && StringUtils.equalsIgnoreCase(request.getMethod(),"post")){
            try{
                validate(new ServletWebRequest(request));
            }catch (ValidateCodeException e){
                myAuthenticationFailureHandler.onAuthenticationFailure(request,response,e);
                return;
            }
        }

        filterChain.doFilter(request,response);
    }

    private void validate(ServletWebRequest request) throws ServletRequestBindingException {
        ImageCode codeInSession= (ImageCode) sessionStrategy.getAttribute(request, ValidateCodeController.SESSION_KEY);
        String codeInRequest=ServletRequestUtils.getStringParameter(request.getRequest(),"imageCode");

        if (StringUtils.isBlank(codeInRequest)){
            throw new ValidateCodeException("验证码的值不能为空");
        }

        if (codeInSession==null){
            throw new ValidateCodeException("验证码不存在");
        }

        if (codeInSession.isExpired()){
            sessionStrategy.removeAttribute(request,ValidateCodeController.SESSION_KEY);
            throw new ValidateCodeException("验证码过期");
        }

        if (!StringUtils.equals(codeInSession.getCode(),codeInRequest)){
            throw new ValidateCodeException("验证码不匹配");
        }

        sessionStrategy.removeAttribute(request,ValidateCodeController.SESSION_KEY);
    }


    public AuthenticationFailureHandler getAuthenticationFailureHandler() {
        return myAuthenticationFailureHandler;
    }

    public void setAuthenticationFailureHandler(MyAuthenticationFailureHandler authenticationFailureHandler) {
        this.myAuthenticationFailureHandler = authenticationFailureHandler;
    }
}